Massachusetts Route 9A

Route 9A
Map of Boston, Massachusetts with MA 9A highlighted in red
Route information
Maintained by MassDOT
Length	3.70 mi (5.95 km)
Existed	1939 or 1940–1971
Major junctions
West end	Route 9 in Brookline
East end	US 20 in Boston
Location
Country	United States
State	Massachusetts
Counties	Norfolk, Suffolk
Highway system
Massachusetts State Highway System Interstate US State
← Route 9 → Route 10

Route 9A was a state highway located in Boston, Massachusetts and Brookline, Massachusetts, United States. The route used Chestnut Hill Ave. from Route 9 to Beacon St. and Beacon St. from there to US 20 in Boston. The western terminus was at the junction of Route 9 and Chestnut Hill Ave. in Brookline. The eastern terminus was at the junction between US 20 and Beacon St. in Boston.

It was commissioned in 1939 or 1940 and decommissioned in 1971.

Major intersections

County	Location	mi	km	Destinations	Notes
Norfolk	Brookline	0.00	0.00	US 20
Suffolk	Boston	1.58	2.54	Route 20A	Western end of Route 20A concurrency. Route 9A and Route 20A were decommissioned at the same time. This was also originally the western end of a concurrency with Route 30; Route 30 moved off the road at some time between 1950 and 1955.
		3.70	5.95	Route 20A / US 20 / Route 30	Eastern terminus, eastern end of Route 20A and Route 30 concurrencies
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus